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Record Details

Record 7 of 381
Studies on the growth and indole-3-acetic acid and abscisic acid content of Zea mays seedlings grown in microgravity
Author and Affiliation:
Schulze, A.(Michigan State University, Department of Botany and Plant Pathology, East Lansing 48824-1312)
Jensen, P. J.
Desrosiers, M.
Buta, J. G.
Bandurski, R. S.
Abstract: Measurements were made of the fresh weight, dry weight, dry weight-fresh weight ratio, free and conjugated indole-3-acetic acid, and free and conjugated abscisic acid in seedlings of Zea mays grown in darkness in microgravity and on earth. Imbibition of the dry kernels was 17 h prior to launch. Growth was for 5 d at ambient orbiter temperature and at a chronic accelerational force of the order of 3 x 10(-5) times earth gravity. Weights and hormone content of the microgravity seedlings were, with minor exceptions, not statistically different from seedlings grown in normal gravity. The tissues of the shuttle-grown plants appeared normal and the seedlings differed only in the lack of orientation of roots and shoots. These findings, based upon 5 d of growth in microgravity, cannot be extrapolated to growth in microgravity for weeks, months, and years, as might occur on a space station. Nonetheless, it is encouraging, for prospects of bioregeneration of the atmosphere and food production in a space station, that no pronounced differences in the parameters measured were apparent during the 5 d of plant seedling growth in microgravity.
Publication Date: Jan 01, 1992
Document ID:
20040090286
(Acquired Sep 07, 2004)
Subject Category: LIFE SCIENCES (GENERAL)
Document Type: Journal Article
Publication Information: Plant physiology (ISSN 0032-0889); Volume 100; 692-8
Publisher Information: United States
Contract/Grant/Task Num: NAG10-0067; NAG2-362; NAGW-97
Financial Sponsor: NASA Kennedy Space Center; Cocoa Beach FL United States
Description: In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: ACETIC ACID; CORN; INDOLES; MICROGRAVITY; PLANT GROWTH REGULATORS; PLANTS (BOTANY); SEEDLINGS (BOTANY); WEIGHTLESSNESS; ABSCISIC ACID; EXOBIOLOGY; GIBBERELLINS; INDOLEACETIC ACIDS; ORGAN WEIGHT; SPACE SHUTTLE MISSIONS
Other Descriptors: PLANT GROWTH REGULATORS/ANALYSIS; SPACE FLIGHT; WEIGHTLESSNESS; ZEA MAYS/CHEMISTRY/GROWTH & DEVELOPMENT; ABSCISIC ACID/ANALYSIS; GIBBERELLINS/ANALYSIS; INDOLEACETIC ACIDS/ANALYSIS; ORGAN WEIGHT; SUPPORT, U.S. GOV'T, NON-P.H.S; SUPPORT, U.S. GOV'T, P.H.S; FLIGHT EXPERIMENT; STS-34 SHUTTLE PROJECT; MANNED; SHORT DURATION; NASA DISCIPLINE NUMBER 00-00; NASA DISCIPLINE NUMBER 40-50; NASA DISCIPLINE PLANT BIOLOGY; NASA PROGRAM FLIGHT; NASA PROGRAM SPACE BIOLOGY; NON-NASA CENTER
Availability Source: Other Sources
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